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Supplement to the video: Criticism from abstruse clumsies is accepted with a bang (let's laugh together). Attention The soldering iron tip must be sharpened (make it flat on both sides, remove pits) and tinned, otherwise the LED will overheat when soldering. When checking the LED with a tester, observe the polarity (if not, it will burn out). A small contact is (+) a large (--), but there are LEDs with contacts of the same size (in the case of 1 bulb being repaired in the video). In this case, you need to focus on the beveled corner of the LED on the phosphor side, this will be a minus (---). A voltmeter-ammeter with a measured voltage of up to 500 volts and a current of up to 10 amperes has appeared on Aliexpress. The price is 260 rubles. The attached LED(s) also need to be replaced if desired, since they will burn out one after another over time, although this is up to the owner.